CVE-2026-63231: Three Learning Koollab Lms

High severity, CVSS 8.1. EPSS: 0.4% chance of exploitation in the next 30 days.

A post-authentication SQL injection vulnerability in Koollab LMS allowed an authenticated attacker to use an error-based SQL oracle via the face-to-face runs update endpoint to read the entire application database and obtain valid JWT tokens for account takeover.

Affected products

• Three Learning Koollab Lms: version 5.3.2 only

Published 2026-07-29. Last modified 2026-07-30.